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DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE 2 Published at the request of the applicant or owner in accordance with the Notice of Apr. 11, 1968, 849 O.G. 1221. Identification is by serial number of the application and the heading indicates the number of pages of specification, including claims, and of sheets or drawing contained in the application as originally filed. The file of this application is available to the public for inspection; reproduction may be purchased for 80 cents per sheet.

Applications published under the Defensive Publication Program have not been examined as to the merits or alleged invention. The Patent Ofllce makes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED MARCH 18, 1969 666 165 METHOD FOR FoRMlggsClGARETTE FILTER John R. Hatfield, Jr., and Charles E. Sandidge, both of R0. Box 511, Kingsport, Tenn. 37662 Filed Sept. 7, 1967. Published Mar. 18, 1969 Class 156-166 2 Sheets Drawing. 15 Pages Specification A method and apparatus for forming cigarette filter rods that includes the step of heating the filter rod fibers and/or plasticizer by microwave energy to cause rapid and even curing of the rods. The microwave energy may be applied to the filter rod fibers either immediately after the tow material is formed, simultaneously with the forming, or after the rod-like configuration of plasticizer containing tow material is wrapped with a wrapper.

Ty p 0/0 DEF. PUB.

March 13, 1969 J. R. HATFIELD, JR. ETAL METHOD FOR FQRMING CIGARETTE FILTER RODS Filed Sept. '7, 196'? wQGm cwmmdm zD wzgmom m0 QOIPME Tgqo/a March 18, 1969 J. R. HATFEELD, -JR.. ETAL DEF. PUB

METHOD FOR FORMING CIGARETTE FILTER RODS SN 655155 Filed Sept. 7, 1967 Sheet .2 of 2 llll O [III/li/II/III/ 3 FIG 4 FIG 5 /i [/1 I/I/I/I I/I I/I/I [/1 4 

